The Hato was a Japanese Otori Class torpedo boat of 595 tons displacement launched in 1937. The Hato was powered by Kanpon oil-fired boilers providing a top speed of 28 knots. She was armed with three 4.7 inch guns; one machine-gun and three 21 inch torpedo tubes arranged in a triple. Found on http://www.probertencyclopaedia.com/browse/RH.HTM